Seam Slippage Test Methods and Acceptable Limits
Seam Slippage is verified through ISO 13936-2 fixed load. Knowing how the method works avoids rejecting fabric that actually meets the requirement.
Method overview
ISO 13936-2 fixed load defines sample size, conditioning and calculation, so values are comparable only within the same revision. Working figures for Seam Slippage normally sit around below 6 mm at 60 N in mainstream production. Note ISO 13936-2 fixed load on the tech pack so nobody tests against an older revision.
Result interpretation
Read the value together with construction notes; below 6 mm at 60 N is only meaningful for similar fabrics. Record elastane content alongside Seam Slippage, because blends shift the measured value. A result outside below 6 mm at 60 N usually points to process drift rather than to the fibre itself.
Typical limits
Buyers commonly write below 6 mm at 60 N with a stated tolerance, then verify against ISO 13936-2 fixed load. Keeping reference values for Seam Slippage lets suppliers quote without extra sampling rounds. Ask for conditioning details together with ISO 13936-2 fixed load, since both affect the reading.
Sources of variation
Conditioning time, operator technique and shade all influence the result. Working figures for Seam Slippage normally sit around below 6 mm at 60 N in mainstream production. Note ISO 13936-2 fixed load on the tech pack so nobody tests against an older revision.
Documentation
Record the standard revision on every report, because older versions can differ from current practice. Record elastane content alongside Seam Slippage, because blends shift the measured value. A result outside below 6 mm at 60 N usually points to process drift rather than to the fibre itself.
